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Black-hole-regulated star formation in massive galaxies
Ignacio Martín-Navarro1,2, Jean P Brodie2, Aaron J Romanowsky1,3
1University of California Observatories, 1156 High Street, Santa Cruz, California 95064, USA.
Massive galaxies host supermassive black holes that regulate star formation. Higher black hole mass leads to earlier and more efficient quenching of star formation, revealing a continuous interplay.
Area of Science:
- Astrophysics
- Galaxy Formation and Evolution
- Black Hole Physics
Background:
- Supermassive black holes reside at the centers of massive galaxies.
- Galaxy formation theories require black hole feedback to regulate star formation.
- Previous simulations failed to reproduce galaxy properties without this feedback.
Purpose of the Study:
- To investigate the observational evidence for co-evolution between supermassive black holes and star formation.
- To understand the impact of central black hole mass on galaxy star formation histories.
Main Methods:
- Analysis of integrated optical spectra from nearby massive galaxies.
- Measurement of galaxy star formation histories.
- Correlation analysis between black hole mass and star formation efficiency.
Main Results:
- Galaxy star formation histories are dependent on the central supermassive black hole mass.
- Black hole mass correlates with gas cooling rates in the early Universe.
- Galaxies with higher-mass black holes exhibit earlier and more efficient star formation quenching.
Conclusions:
- There is a direct observational link between supermassive black hole mass and galaxy star formation.
- Black hole activity continuously influences baryon cooling and star formation throughout a galaxy's life.
- This finding reconciles theoretical models with observational data, advancing our understanding of galaxy evolution.
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